Measurement Computing UL for NI LabVIEW - Manual (Page 63)

Universal Library Virtual Instruments (VIs) Counter VIs
CIn.VI
Reads the current count from a counter.
Summary:
Inputs: BoardNum [U32] - The board number assigned when installed with InstaCal. Can
be 0 to 100.
CounterNum [I32] - Counter number to read
Outputs: Count [I32] - Count returned here
ErrCode [I32] - Error code. See ErrMsg.VI
Arguments:
BoardNum The board number associated with a board when it was installed with InstaCal. The
specified board must have a counter.
CounterNum The counter to read current count from. Valid values are 1 to 20, up to the number
of counters on the board.
1 Counter input to counter 1.
2 ...20 Counter inputs 2 through 20
Count Current count value from selected counter is returned here.
ErrCode Error code returned from the Universal Library. Zero if no error occurred. Use the
ErrMsg VI to convert ErrCode into a readable string.
Notes:
CIn.VI vs. CIn32.VI: Although the CIn.VI and CIn32.VI perform the same operation, CIn32.VI is the
preferred function to use.
The only difference between the two is that CIn.VI returns a 16-bit count value and CIn32.VI returns a 32-bit
value. Both CIn.VI and CIn32.VI can be used, but CIn32.VI is required whenever you need to read count
values greater than 16 bits (counts > 65535). For instance, LS7266 based counters are 24-bit counters and can
return values larger than a 16-bit value.
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